<template>
  <div>
    <!--面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片区域-->
    <el-card>
      <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon :closable="false"></el-alert>
      <!--选择商品分类区域-->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!--级联选择框-->
          <el-cascader
            v-model="selectKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!--tab页签区域-->
      <el-tabs v-model="activeTab" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
          >添加参数</el-button>
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="deleteTag(i,scope.row)">{{item}}</el-tag>
                <!--添加标签-->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index" label="序号" align="center"></el-table-column>
            <el-table-column prop="attr_name" label="参数名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="deleteParam(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
          >添加属性</el-button>
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="deleteTag(i,scope.row)">{{item}}</el-tag>
                <!--添加标签-->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index" label="序号" align="center"></el-table-column>
            <el-table-column prop="attr_name" label="属性名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="deleteParam(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!--添加参数弹框-->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParam">确 定</el-button>
      </span>
    </el-dialog>
    <!--修改参数弹框-->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClose"
    >
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParam">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      cateList: [],
      selectKeys: [],
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      activeTab: 'many',
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res && res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      this.cateList = res.data
    },
    handleChange() {
      this.getParamsData()
    },
    handleClick() {
      this.getParamsData()
    },
    // 获取参数请求
    async getParamsData() {
      // 只允许选中三级分类
      if (this.selectKeys.length !== 3) {
        this.selectKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      const { data: res } = await this.$http.get(
        'categories/' + this.cateId + '/attributes',
        { params: { sel: this.activeTab } }
      )
      if (res && res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      if (this.activeTab === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClose() {
      this.$refs.addFormRef.resetFields()
    },
    // 添加参数
    addParam() {
      this.$refs.addFormRef.validate(async validate => {
        if (!validate) {
          return
        }
        const { data: res } = await this.$http.post(
          'categories/' + this.cateId + '/attributes',
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeTab
          }
        )
        if (res && res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        // 关闭对话框
        this.addDialogVisible = false
        // 刷新列表
        this.getParamsData()
        this.$message.success(res.meta.msg)
      })
    },
    // 修改参数部分
    editDialogClose() {
      this.$refs.editFormRef.resetFields()
    },
    async showEditDialog(attrId) {
      const { data: res } = await this.$http.get(
        'categories/' + this.cateId + '/attributes/' + attrId,
        { params: { attr_sel: this.activeTab } }
      )
      if (res && res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.editDialogVisible = true
      this.editForm = res.data
    },
    editParam() {
      this.$refs.editFormRef.validate(async validate => {
        if (!validate) {
          return
        }
        const { data: res } = await this.$http.put(
          'categories/' + this.cateId + '/attributes/' + this.editForm.attr_id,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeTab
          }
        )
        if (res && res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新列表
        this.getParamsData()
        this.$message.success(res.meta.msg)
      })
    },
    // 删除参数部分
    async deleteParam(attrId) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该参数, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('您取消了该操作')
      }
      const { data: res } = await this.$http.delete(
        'categories/' + this.cateId + '/attributes/' + attrId
      )
      if (res && res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      // 刷新列表
      this.getParamsData()
      this.$message.success(res.meta.msg)
    },
    // 添加标签部分
    async handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.editTag(row)
    },
    showInput(row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除标签
    deleteTag(i, row) {
      row.attr_vals.splice(i, 1) // js从删除数组中下表为i的地方开始删除1个
      this.editTag(row)
    },
    // 修改标签提取的方法
    async editTag(row) {
      const { data: res } = await this.$http.put('categories/' + this.cateId + '/attributes/' + row.attr_id, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res && res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
    }
  },
  computed: {
    // 控制按钮是否被禁用
    isBtnDisabled() {
      return this.selectKeys.length !== 3
    },
    // 获取选中的三级分类的id
    cateId() {
      return this.selectKeys.length === 3 ? this.selectKeys[2] : null
    },
    // dialogTitle设置
    titleText() {
      return this.activeTab === 'many' ? '动态参数' : '静态属性'
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-cascader .el-input {
  width: 250px;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
    width: 120px;
}
</style>
